Alpine R-A90S 6-Channel Car Amplifier

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$ 999.00 $899.00

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Alpine R-A90S 6-Channel Car Amplifier

  • 75 watts RMS x 4 + 150 watts RMS x 2 at 4 ohms
  • 100 watts RMS x 4 + 250 watts RMS x 2 at 2 ohms
  • 200 watts RMS x 2 bridged at 4 ohms + 500 watts RMS x 1 bridged at 4 ohms

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SKU: RA90S Category:

Frequently Bought Together

+Alpine S-S69C+
Price for all three:   $2,597.00

Product Description

Alpine R-A90S 6-Channel Car Amplifier

Experience your music in Hi-Res with the versatile Alpine R-A90S 6-Channel Amplifier for hair-raising details that puts you in the center of the performance.


The R-A90S features a staggered power channel layout that allows each channel to host different levels of power, compared to traditional, multi-channel amplifiers. This allows the R-A90S to effectively function as both a 3-way active amplifier and a 5-channel amplifier by delivering the power you need to the channels where you need it the most. Now you can use one amplifier to either power an active 3-way sound system or use it to power your speakers and subwoofer without the bulk of an additional amplifier.


Hear the subtle details you’ve been missing in your music with the R-A90S. With the highest power output in its category, the R-A90S drives power to your sound system to create a big dynamic music range for the listener, reproducing high-frequency sounds up to 45k Hz, making the R-A90S Hi-Res Audio Compliant.
Hair-raising detail


For the best possible sound experience, use the built-in bandpass, high pass, or low pass filter to individually power each component in your sound system and assign frequency bands for accurate and reliable sound reproduction.


The R-A90S maintains an extremely low phase shift throughout the music spectrum which minimizing audible imperfections in your music and allows your music to stay faithful to the original recording. The result is hair-raising detail that puts you in the center of the performance.


Using the same exclusive technology launched in Alpine’s premium X-Series Amplifiers, the R-A90S has dual “Sierra” post-filter feedback loops that correct signal distortion by making the output as close as possible to the original input. The result is music that stays true to the artist’s intention.


The R-A90S has input capability to add an optional RUX-KNOB.2 Remote Bass Control Knob (sold separately). The remote bass knob controls the bass in your subwoofer by adjusting the gain on your amplifier for quick bass adjustments when needed.


Alpine’s R-Series line of speakers, subwoofers, and amplifiers have a heritage of sound quality that can be heard from a block away. The R-A90S is tuned to emphasize the characteristics of the R-Series speakers and subwoofers for a legendary R-Series experience.

Additional Information


-6-channel car amplifier
-75 watts RMS x 4 + 150 watts RMS x 2 at 4 ohms
-100 watts RMS x 4 + 250 watts RMS x 2 at 2 ohms
-200 watts RMS x 2 bridged at 4 ohms + 500 watts RMS x 1 bridged at 4 ohms
-Class D amp technology
-Ch 1/2: selectable variable high-pass filter (50-400 Hz or 400-6000 Hz, 12 dB/octave)
-Ch 3/4: variable high-pass or bandpass filter (50-400 Hz and 400-6000 Hz, 12 dB/octave)
-Ch 5/6: variable low-pass filter (50-400 Hz, 12 dB/octave)

More Info:
-GTO™ (Great Turn On) signal-sensing turn-on with Ch1/2 speaker-level input
-preamp and speaker-level inputs
-speaker-level inputs require RCA adapter cables
-optional wired remote level controller available
-fuse rating: 30A x 3
-4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
-dimensions: 12″W x 2-1/8″H x 10″D

Mobile Amplifier Channels

6 Channel

Mobile Amplifier Class

Class D

Mobile Amplifier Features

High-Pass Filter, Low-Pass Filter, Speaker Level Inputs

Mobile Amplifier Fuse Rating


Mobile Amplifier RMS

61 to 89 watts, 81 to 100 watts, 151 to 200 watts

Mobile Min Impedance


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Alpine Canada 1 Year Limited Warranty


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